





Stainless Steel Straight Coupling is machined after forging of round steel or steel ingots. Its connection form is socket welding (socket welding-SW). The steel pipe is inserted into the socket hole for welding. Therefore, it is called "Stainless Steel Straight Coupling”.
Stainless Steel Straight Coupling essentially means that when the branch pipe is connected to the main pipe, it is enlarged through the half-pipe joint to facilitate welding, and then the other end is connected to the branch pipe.
Straight coupling is widely used in pipes of different diameters, including tee, cross, etc., and can also be used for water meters and valves. Due to the socket structure, the pipe joint reduces the cost and is extremely convenient to install, use, and maintain. It has a lot of advantages, like a smooth surface, not easy to corrode, zero maintenance, and long service life. It also has extremely high leakage prevention capabilities and has great market prospects.
Application: This fitting is ideal for joining two unthreaded pipes where high tensile and impact strength is required. Widely used in building construction, bathrooms, kitchens, sinks, laboratories, etc.
Introduction
|
Item |
Stainless Steel Straight Coupling |
|
Standard |
ANSI B16.11, MSS SP 97, MSS SP 95, MSS SP 83, BS3799, ASTM A733, etc. |
|
Material |
Stainless Steel |
|
Surface |
CNC machined, anti-rust oil, HDG(hot dip gal.) |
|
Type |
Casting |
|
size |
DN6-100 |
|
Delivery time |
Within 5-30 days after receiving the prepaid |
|
Packing |
Carton or Wooden Case. Also Can Be Customized as per the client's requirements |
|
Application |
The petrochemical industry; aviation and aerospace industry; pharmaceutical industry, gas exhaust; power plant; ship building; water treatment, etc. |

Dimensions in Millimeters
|
Nominal Diameter |
B |
D |
C |
J |
E |
||||||||
|
DN |
NPS |
3000LB |
6000LB |
9000LB |
3000LB |
6000LB |
9000LB |
||||||
|
ave |
min |
ave |
min |
ave |
min |
||||||||
|
6 |
1/8" |
10.9 |
6.1 |
3.2 |
- |
3.18 |
3.18 |
3.96 |
3.43 |
- |
- |
9.5 |
6.5 |
|
8 |
1/4" |
14.3 |
8.5 |
5.6 |
- |
3.78 |
3.30 |
4.60 |
4.01 |
- |
- |
9.5 |
6.5 |
|
10 |
3/8" |
17.7 |
11.8 |
8.4 |
- |
4.01 |
3.50 |
5.03 |
4.37 |
- |
- |
9.5 |
6.5 |
|
15 |
1/2" |
21.9 |
15.0 |
11.0 |
5.6 |
4.67 |
4.09 |
5.97 |
5.18 |
9.53 |
8.18 |
9.5 |
9.5 |
|
20 |
3/4" |
27.3 |
20.2 |
14.8 |
10.3 |
4.90 |
4.27 |
6.96 |
6.04 |
9.78 |
8.56 |
12.5 |
9.5 |
|
25 |
1" |
34.0 |
25.9 |
19.9 |
14.4 |
5.69 |
4.98 |
7.92 |
6.93 |
11.38 |
9.96 |
12.5 |
12.5 |
|
32 |
1 1/4" |
42.8 |
34.4 |
28.7 |
22.0 |
6.07 |
5.28 |
7.92 |
6.93 |
12.14 |
10.52 |
12.5 |
12.5 |
|
40 |
1 1/2" |
48.9 |
40.1 |
33.2 |
27.2 |
6.35 |
5.54 |
8.92 |
7.80 |
12.70 |
11.12 |
12.5 |
12.5 |
|
50 |
2" |
61.2 |
51.7 |
42.1 |
37.4 |
6.93 |
6.04 |
10.92 |
9.50 |
13.84 |
12.12 |
16.0 |
19.0 |
|
65 |
2 1/2" |
73.9 |
61.2 |
- |
- |
8.76 |
7.62 |
- |
- |
- |
- |
16.0 |
19.0 |
|
80 |
3" |
89.9 |
76.4 |
- |
- |
9.52 |
8.30 |
- |
- |
- |
- |
16.0 |
19.0 |
|
100 |
4" |
115.5 |
100.7 |
- |
- |
10.69 |
9.35 |
- |
- |
- |
- |
19.0 |
19.0 |
Xinhang Special Material Co., Ltd. Hangzhou Branch is famous China Stainless Steel Double Socket Weld Straight Coupling Forged Quick Coupling suppliers and OEM/ODM Stainless Steel Double Socket Weld Straight Coupling Forged Quick Coupling manufacturers, founded in 2007 and moved to Longyou Economic Development Zone, Zhejiang Province, in 2022. It covers an area of 130,000 square meters, more than 30 production lines, 300 workers, 20 R&D people, 30 inspection people and an annual output of 50,000 tons.
It has passed ISO9001:2008 quality management system, PED 97/23/EC EU Pressure Equipment Directive certification, China Special Equipment Manufacturing License (Pressure Tube) TS certification, ASME certification, provincial enterprise standardization management system, ISO14000:2004 environment management system, cleaner production (green enterprise), and a series of certifications, as well as China Classification Society (CCS), American Bureau of Shipping (ABS), British Register of Shipping (LR), Deutsche Veritas (GL), Bureau Veritas Society (BV), Det Norske Veritas (DNV), and Korean Register of Shipping (KR) factory certification.
The main products include stainless steel pipes, pipe fittings, flanges, valves, etc., which are widely used in petroleum, chemical industry, nuclear industry, smelting, shipbuilding, pharmaceuticals, food, water conservancy, electric power, new energy, mechanical equipment, and other fields. The company adheres to the corporate tenet of "quality for survival, reputation for development" and wholeheartedly serves every customer to create a win-win situation.


A single specification mistake can turn a $50,000 piping system into a pitted, leaking liability within six months. I have seen process lines in coastal chemical plants fail not because the material w...
View MoreA chemical plant operator inspects a 316L pipeline after six months of dilute hydrochloric acid service. The base metal gleams like new, but the heat-affected zones alongside welds show distinct pitt...
View MoreFor load-bearing structures exposed to moisture, chemicals, or saline environments, stainless steel square tube in austenitic grades 304 or 316 delivers the best long-term value. A 50×50×2.5 mm 304 sq...
View MoreWe'll never share your email address and you
can opt out at any time, we promise.